Using C++ output functions

[Wolfram Wiesemann]

I guess this problem is less related to GMP than to general C++ compilation,
but it would be very helpful if someone could nevertheless explain me what
to do.

When compiling the following simple program

#include <gmp.h>
#include <gmpxx.h>
#include <iostream>

using namespace std;

int main() {
  mpf_class f;
  f = 3.5 * 2.2;
  cout << f;
  return 0;
}

with the following command

g++ max-npv.cc -static -lgmp -lgmpxx

I get the following error message:

/usr/local/lib/libgmpxx.a(osmpf.o): In function
`operator<<(std::basic_ostream<char, std::char_traits<char> >&, __mpf_struct
const*)':
osmpf.cc:(.text+0x131): undefined reference to `__gmp_doprnt_mpf2'
osmpf.cc:(.text+0x139): undefined reference to `__gmp_asprintf_final'
/usr/local/lib/libgmpxx.a(osfuns.o):(.rodata+0x4): undefined reference to
`__gmp_asprintf_memory'
/usr/local/lib/libgmpxx.a(osfuns.o):(.rodata+0x8): undefined reference to
`__gmp_asprintf_reps'
collect2: ld returned 1 exit status

If I remove the line "cout << f" from the code, everything works fine. I
have used the "--enable-cxx" parameter during the make process, so that
should be okay.

Can anybody give me a hint what I need to do?

Best,

Wolfram
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